Spring fastening device.



J SCHADE Jn SPRING FASTENING DEVICE. APPLICATION FILED DEC 23, 19141,212,821, Patented Jan. 16,1917.

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J. SCHADE, In.

SPR ING FASTENING DEVICE.

APPLICATION FILED use. 23, um.

1,212,821 Patentd-Jan. 16,1917.

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JOHN SCHADE, JR. OF BROOKLYN, NEW YORK.

SPRING FASTENING DEVICE.

Specification ofLetters Patent.

Patented Jan. 16, 1917.

Original application filed March 13, 1913, Serial No. 754,128. Dividedand this application filed December 23, 1914. Serial No. 878,653.

To all whom it may concern Be it known that I, JOHN Sermon, Jr., acitizen of the United States, and a resident of the borough of Brooklyn,county of Kings, city and State of New York, have invented certain newand useful Improvements in Spring Fastening Devices, of which thefollowing is a specification, ac- I companied by drawings.

This invention relates to spring fastening devices for electricalconductors.

The particular form of fastening device upon which the present inventionis an im provement insevera'l respects, is thatforin in which the deviceis made out of spring wire. It is highly desirable that such a devicemade out of wire be provided with attaching means for securing thedevice directly to a support and acting to maintain the device uprightand restrain it, when fastened down to the support, from tippingsidcwise under transverse strain. V

The device should also enable the conductor to be firmly gripped andclamped in defined position to permitthe ready insertion and removal ofthe conductor and in-- sure good electrical contact at all times between the conductor and the fastening device.

The present application is a division of my co-pending applicationSerial No. 75,128, filed March 13, 1913, said application being arenewal of my application Serial No. 347,757, filed December 13, 1906.The invention is illustrated in the nccompanying drawings, in which-Figures 1, 2, 3, 4 and 5 are perspective views of different forms offastening devices embodying the invention.

My improved fastening device is preit'er ably ado from a single piece ofresilient material, as for ins ance metallic spring wire,

and it may be lnade out of a single piece' of wire or several pieces, ifdesired. In each of the figures, the spring wire is 100 ed on itself toform body and spring me'm ers A and B and vas shown, each of saidmembers is formed for substantially its-length, of parallel wires. Boththe body and spring members A and B are provided with angular retainingportions C and C at points oppcr site each other, whereby a conductormaybe firml gripped when the body and spring" mom are A and B are forcedinto c'oiiperative relationship, and at least one of said lying. inContact with the retaining portions over an extended surface on theconductor.

The wire of which the spring fastening device is formed may have anysuitable shape in cross section and in Figs. 1, 3, 4: and 5, round wireis shown, while in Fig. 2 wire which is rectangular in cross section isshown. In Fig. 2 the area. of contact between the conductor K and thefastening device is increased and the same effect can be obtained byflattening'the round wire inside the bends of the retaining portions.

Although in Figs. land 5 the angular retaining portions C are formed ofthe ends of" the wire, this construction is equivalent to that shown inFigs. 1, 2 and 3, in'which the angular retaining portions 0 are formedby bendin the body member A.

In all 0 the forms of the invention shown in the figures, the springmembers B are provided with thumb pieces E which extend outwardly awayfrom the loops D of the device and provide-means for forcing the bodyand spring members into cofiperative relationship.

In the forms'of the invention sho n in the'drawings, I have preferred toillustrate the device as made out of a single piece of spring wirelooped on itself at D toform oppdsin normally separated body m1 springbers bein composed forsulistantiall their length 0 'parallel wircs. Bothbo y and spring members1A and B are provided with angular wire retainingportioiis C and C at points op osite :to .each other, the respectiveembersAnnd B, each of said memwires of t e retaining portions lyingclosely adjacent ci cirhthegside by side, so that the betweenalliof-thewi-res of the retaining portions C and Q, when the body andspring members areforced into coiiperative relationship. At least one ofthe angular retaining portions 0 or C of the body and spring inenilwrs,is shaped to form a right angle or less. and ear-h separate wire of theangular relaining portion which is equal to a right angle or less, has apair of opposing points of contact with the eoinluetor K at tangents tothe (OlHlllCl-UX'. It will be seen that such pairs of tangentialcontacts on separate wires lie in a plane nearer to the center oi. theroinlurtor K than said plane is to the apex of the said angularretaining portion. This eoi'istrurtion causes the eondoctor to becomefirmly wedged within the angle of the retaining portion so that it. isgripped and held in defined position between the 0 '1 'MiSln mints ot'contaeton the a 1 separate. wires of the said retaining portion. It isfor this raason that one at least. and preferably both of the angularretaining portions (l and (f' are shaped to form a right angle or less.In the forms of the invention illustrated, both, or at least one of theends H of the lengths of wire forming the deviees, are bent to form abroadened foot adapted to lie tiat upon a base or support Iandeapable'ot receiving a securing 'lerice J for securing the springFastening .e directly to the support I. The brow d foot formed by theportions II also arts to maintain the clip upright and restrain it. whenfastened down to the support, from tipping sidewise under transversestrain.

The other terminal of the eirruit L may be secured to the securingdevice. J as by means of the nut O.

In Fig". 1 the angular resistant or retain 'ing portions 0 of the bodymember are in closed by the angular retaining portion C of the springmember and this same construction is true of Fig. 2.

In Fig. 3 the angular resistant or retaining portions C of the bodymember inclose the angular resistant or retaining portion G of thespring member.

In Fig. 4 the projecting hooked ends forming the resistant or retainingportion C of the bodymember A, are inclosed by the angular retainingportion C of'the spring member B, and in F 5 the construction is similarto that shown in Fig. 4, except that the. portions H of the free ends ofthe wires are brought together, instead ol. being separated, as in Fig.4.

l rlaini and desire to obtain by Letters Patent the following:

A spring fastening device for eleetrieal conductors, made of spring wirelooped on itself to form opposing body and spring ineinlwrs, eaeheoniposed for substantially. their leugth'of parallel wires, and bothhaving angular wire retaining portions at opposite points, therespective wires of said retaining portions lying elosely adjacent earhother, side by side, whereby the conductor may be inserted transverselybetween all of thewires of said retaining por ions.

when said body and spring members. re forced into cooperativerelationship, at at one of said angular retaining portions ,5 ing shapedto form a right angle or .4, having opposing points of contact witheoialaetor at tangents to the conductor ly in p'lane nearer to thecenter of the duetor than to the apex of the said angular retainingportion, thereby causing tin sonduetor to become firmly wedged withinthe angle of said retaining portion and gripped and held in definedposition between the opposing points of contact on the separate. wiresof said retaining portion, one of said body or spring members extendingbeyond the ang'ulz wire retaining portion of said member and in adirection away from The loop of the fastening device, said'extensionhaving a broadened foot adapted to lie fiat upon av base or support, andacting to maintain the device upright and restrain it, when fastened,from tipping sidewise under transrerse strain, whereby the fasteningdevice may be secured (ii) a base or support.

In testimony whereof I have signed this in specification in the presenceof two subscrib-

